光纤陀螺标度因数分段标定的工程实现  

Engineering realization of calibrating FOG’s scale factor in segments

作　　者：张志鑫[1] 夏金桥 蔡春龙 

机构地区：[1]北京航天控制仪器研究所,北京100854

出　　处：《中国惯性技术学报》2008年第1期99-103,共5页Journal of Chinese Inertial Technology

基　　金：国防基础科研项目(C0320060532)

摘　　要：基于光纤陀螺标度因数存在非线性和不对称性,从工程实用角度出发,介绍了光纤陀螺速率标定方法,给出了光纤陀螺标度因数分段标定的工程实现方案,阐述了速率标定测试数据最优分段原则,找出了使分段标定后不连续光纤陀螺模型变成连续模型的解决措施。多个光纤陀螺速率标定的研究结果显示:分段标定能较大程度上减小光纤陀螺标度因数非线性度;利用实测数据进行离线导航计算的结果表明:对光纤陀螺标度因数分段标定能减小标度因数误差对导航精度的影响,文中分段标定方法切实可行。For the nonlinearity and unsyrnmetry of FOG＇s scale factor, an implementation method of calibrating FOG＇s scale factors segment by segment is presented from the view of engineering application. The way of selecting angular rate point to group test data optimally is introduced. The solution to turning discontinuous gyro model into continuous one is described. The calibration result of several FOGs shows that the nonlinearity of FOG＇s scale factor reduced considerably when calibrated in segments. Off-line simulation using measured data of sea trial also shows that navigation errors caused by the error of FOGs＇ scale factor decreased while the FOG＇s scale factor calibrated segment by segment. It is concluded that the method presented is feasible.

关 键 词：捷联惯性导航系统 光纤陀螺 标度因数非线性 分段标定 

分 类 号：U666.1[交通运输工程—船舶及航道工程]